Underwater viewer



FIG. 1 is a front elevational view of an underwater viewer, showing mynew design;

FIG. 2 is a side elevational view, the opposite side being a mirrorimage thereof;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view; and

FIG. 5 is a bottom plan view.

The ornamental design for an underwater viewer, as shown and described.